I have a Twitter account but honestly, I don't like the interface. And, it's pretty much a shit show. One time I voiced an honest opinion about something pretty irrelevant and I was called a Nazi and Communist in the same thread. It's good to know I follow the wide band of the political spectrum.
I do follow people like Sam Harris and Sam hasn't called me a single name but I think he is pretty much the exception to the rule.
Mudkipz